Coal body stress monitoring device

Abstract

The utility model discloses a coal body stress monitoring device which comprises a cylinder body with two open sides, a swing adjusting assembly is fixed in the cylinder body, a strain gauge is fixed at the output end of the swing adjusting assembly, the output end of the swing adjusting assembly can swing out of the cylinder body through a through hole, and the through hole is fixed on the side wall of the cylinder body. Through the arrangement of the swing adjusting assembly, the distance between the two strain gauges can be adjusted, so that the device is suitable for stress monitoring of coal bodies with different pore sizes, and is more convenient to use.

Description

Technical field:

[0001] The utility model relates to the technical field of stress monitoring, in particular to a coal body stress monitoring device. Background technology:

[0002] The change of coal body stress is an important indicator for determining the risk of rock burst. The aperture deformation method is a relatively mature indirect measurement method for ground stress measurement. Its basic principle is to measure the change of borehole diameter during stress elimination and calculate the stress state in the plane perpendicular to the borehole axis, and establish the three-dimensional stress state of a point through measurements of three non-parallel boreholes.

[0003] Coal stress monitoring by the aperture deformation method is usually carried out by inserting sensors such as strain gauges or strain gauges into the boreholes of the coal body. Traditional coal stress monitoring methods usually use sensors such as strain gauges or strain gauges for measurement, but when inserting these sensors into the boreholes of the coal body, the size and shape of the aperture need to be considered to ensure that the sensor can accurately measure the strain changes. However, traditional methods have certain limitations in dealing with coal stress monitoring with different aperture sizes and are inconvenient to use. Utility model content:

[0004] To this end, the utility model provides a coal stress monitoring device to overcome the problem that traditional coal stress monitoring methods in the prior art usually use sensors such as strain gauges or strain gauges for measurement, but when inserting these sensors into the drill holes of the coal body, it is necessary to consider the size and shape of the aperture to ensure that the sensor can accurately measure the strain changes. However, traditional methods have certain limitations in the process of coal stress monitoring with different aperture sizes and are inconvenient to use.

[0005] The utility model is implemented by the following technical solutions:

[0006] A coal body stress monitoring device comprises a cylinder with two open sides, a swing adjustment component is fixed in the cylinder, a strain gauge is fixed on the output end of the swing adjustment component, the output end of the swing adjustment component can be swung out of the cylinder through a through hole, and the through hole is fixed on the side wall of the cylinder.

[0007] Preferably, the swing adjustment assembly includes a positioning member, a swing member and a driving member, the positioning member realizes a positioning and fixing function, the positioning member is movably connected with a swing member, and the swing member is movably connected with a driving member, and the driving member can drive the swing member to swing and adjust.

[0008] Preferably, the positioning member comprises a positioning disc, and the positioning disc is fixedly connected to the inner wall of the cylinder via a connecting rod.

[0009] Preferably, the swing member includes two swing plates, a strain gauge is fixedly connected to the top of one side of the swing plate, and the other end is hinged to the positioning disk through a hinge shaft, and the other ends of the two swing plates are respectively fixedly connected to the fixed plate through the hinge points with the positioning disk.

[0010] Preferably, a sliding rod is fixed on each of the two fixed plates, the sliding rod fits through the sliding hole and is slidably connected to the sliding hole, the sliding hole is fixed on the arc plate, the arc plate is concentrically arranged with the positioning disk, and a spring is fixedly connected between the side end of the sliding rod and the inner wall of the sliding hole.

[0011] Preferably, the driving member comprises an arc-shaped plate, a fixing block is fixed on the arc-shaped plate, one end of the fixing block is fixedly connected with a rope, and the rope passes through the limit block and passes out of the cylinder to be fixedly connected with the iron rod.

[0012] Preferably, the other end of the fixed block is fixedly connected to a magnet block, and a limiting hole is provided on the side end of the magnet block, the limiting hole is penetrated and arranged on the positioning disc, and the limiting hole can pass through the iron rod.

[0013] Preferably, the limit block is slidably arranged in the side end of the cylinder, and locking bolts are respectively screwed on the two side ends of the cylinder.

[0014] The utility model has the advantages that the distance between the two strain gauges can be adjusted by setting the swing adjustment component, so that it is suitable for monitoring the stress of coal bodies with different aperture sizes and is more convenient to use. Description of the drawings:

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0018] Figure 3 It is a schematic diagram of a partial side cross-sectional structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the splicing structure used in the utility model;

[0020] Figure 5 For the utility model Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0021] In the figure: cylinder 1, positioning disc 2, swing plate 3, fixed plate 4, sliding rod 5, arc plate 6, sliding hole 7, spring 8, fixed block 9, magnet block 10, rope 11, limit block 12, iron rod 13, limit hole 14. Specific implementation method:

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 , Figure 2 As shown, the stress monitoring device includes a cylinder 1 with open sides, a swing adjustment component is fixed inside the cylinder 1, a strain gauge is fixed on the output end of the swing adjustment component, and the output end of the swing adjustment component can be swung out of the cylinder 1 through a through hole, and the through hole is fixed on the side wall of the cylinder 1.

[0024] During use, the outer diameter of the cylinder 1 is set to the minimum specification, which is smaller than the minimum borehole diameter on the coal body. This ensures that the cylinder 1 can be inserted into the borehole. Then, according to the size of the borehole diameter, the adjustment function of the output end of the swing adjustment component is utilized to allow the strain gauge to contact the inner wall of the borehole, thereby completing the stress monitoring function.

[0025] The swing adjustment component includes a positioning member, a swing member and a driving member. The positioning member realizes the positioning and fixing function. At the same time, the positioning member is movably connected with the swing member, and the swing member is movably connected with the driving member. In this way, the driving action of the driving member can make the swing adjust to a certain amplitude.

[0026] The positioning member includes a positioning disc 2, which is fixedly connected to the inner wall of the cylinder 1 through a connecting rod; the positioning disc 2 is used to achieve the positioning effect;

[0027] The swinging member includes two swinging plates 3, a strain gauge is fixedly connected to the top of one side of the swinging plate 3, and the other end is hinged to the positioning disc 2 through a hinge shaft, and the other ends of the two swinging plates 3 pass through the hinge points with the positioning disc 2 and are fixedly connected to the fixed plate 4, respectively. During the swinging process of the fixed plate 4, the correspondingly connected swinging plate 3 can be driven to swing out of the through hole, so that the strain gauge can contact the inner wall of the drill hole;

[0028] The two fixed plates 4 are respectively fixed with sliding rods 5, which fit through the sliding holes 7 and are slidably connected with the sliding holes 7. The sliding holes 7 are fixed on the arc-shaped plate 6, which is concentrically arranged with the positioning disc 2. A spring 8 is fixedly connected between the side end of the sliding rod 5 and the inner wall of the sliding hole 7.

[0029] When the sliding rod 5 slides in the sliding hole 7, the fixed plate 4 can be made to swing to a certain extent, thereby controlling the swing plate 3 to swing. At the same time, the action force of the spring 8 can be used to achieve the function of limiting the sliding rod 5.

[0030] The driving member includes an arc-shaped plate 6, a fixing block 9 is fixed on the arc-shaped plate 6, one end of the fixing block 9 is fixedly connected with a rope 11, the rope 11 passes through the limit block 12, and passes through the cylinder 1 and is fixedly connected with the iron rod 13;

[0031] Pulling the iron rod 13 allows the rope 11 to transmit to the arc plate 6, so that the arc plate 6 can move, thereby achieving the function of driving the fixed plate 4.

[0032] like Figure 3 , Figure 4 As shown, the other end of the fixed block 9 is fixedly connected to a magnet block 10, and a limiting hole 14 is provided at the side end of the magnet block 10. The limiting hole 14 is provided through the positioning disc 2, and the limiting hole 14 can pass through the iron rod 13;

[0033] The limit block 12 is slidably arranged in the side end of the cylinder 1, and locking bolts are respectively screwed on the two side ends of the cylinder 1.

[0034] By screwing locking bolts and limit blocks 12 on both side ends of the cylinder 1, multiple cylinders 1 can be connected. At the same time, during the connection process, the iron rod 13 can be passed through the limit hole 14 and fixedly connected to the magnet block 10 by adsorption, and the force generated is greater than the force of the rope 11 being pulled. In this way, multiple cylinders 1 can be connected and stress monitoring at different drilling depths can be achieved.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal body stress monitoring device, characterized in that: It comprises a cylinder with two open sides, a swing adjustment component is fixed in the cylinder, a strain gauge is fixed on the output end of the swing adjustment component, the output end of the swing adjustment component can swing out of the cylinder through a through hole, and the through hole is fixed on the side wall of the cylinder.

2. A coal body stress monitoring device according to claim 1, characterized in that: The swing adjustment assembly includes a positioning member, a swing member and a driving member. The positioning member realizes the positioning and fixing function. The positioning member is movably connected with the swing member, and the swing member is movably connected with the driving member. The driving member can drive the swing member to swing and adjust.

3. A coal body stress monitoring device according to claim 2, characterized in that: The positioning member comprises a positioning disc, and the positioning disc is fixedly connected to the inner wall of the cylinder through a connecting rod.

4. A coal body stress monitoring device according to claim 3, characterized in that: The swing member includes two swing plates, a strain gauge is fixedly connected to the top of one side of the swing plate, and the other end is hinged to the positioning disc through a hinge shaft, and the other ends of the two swing plates pass through the hinge points with the positioning disc and are fixedly connected to the fixed plate.

5. A coal body stress monitoring device according to claim 4, characterized in that: A sliding rod is fixed on the two fixed plates respectively. The sliding rod fits through the sliding hole and is slidably connected with the sliding hole. The sliding hole is fixed on the arc plate. The arc plate is concentrically arranged with the positioning disk. A spring is fixedly connected between the side end of the sliding rod and the inner wall of the sliding hole.

6. A coal body stress monitoring device according to claim 5, characterized in that: The driving member comprises an arc-shaped plate, a fixing block is fixed on the arc-shaped plate, one end of the fixing block is fixedly connected with a rope, and the rope passes through the limiting block, passes out of the cylinder and is fixedly connected with the iron rod.

7. A coal body stress monitoring device according to claim 6, characterized in that: The other end of the fixed block is fixedly connected with a magnet block, and a limiting hole is arranged at the side end of the magnet block. The limiting hole is arranged through the positioning disc, and the iron rod can pass through the limiting hole.

8. A coal body stress monitoring device according to claim 7, characterized in that: The limit block is slidably arranged in the side end of the cylinder, and locking bolts are respectively screwed on the two side ends of the cylinder.

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